Author: Javier Gamero
Date: 17:08:00 12/23/04
First of all, thanks to Michael Byrne for his work doing "personalities" for Crafty (and obviously big thank to Bob Hyatt for all his hard, generous work, past and present). I'm interested in Byrne's "special" command "intensity". Reading "readme.txt" file in Byrne's SE version of Crafty, I can see intensity 1 is about 1200-1300 ELO and 50 is about 1500-1600. I have some questions about this, mostly for Michael Byrne, I am afraid :) , but if someone can apport something about it, it would be very welcome. - I assume you are estimating it using a Dual 1.7 GHz, is it right? - Is Dual 1.7 perfomance nearly the same as a 3.4 Ghz single CPU? - What's Crafty full strength (intensity 10000) in that system? - Are those ELOs in reference to FIDE ELO or maybe USCF ELO? I know ELO rating of chess "handicapped" engines is just an approximation, but knowing some data about perfomance a smooth ELO-strength system could be made. Possibly in weak "personalities" doubling intensity add about 70 ELO and multiplying by 3 add about 100 ELO (those are known tipical values, although not an absolute truth, of course). I have searched some of the threads about handicapped "personalities" and I find this question interesting. Another question is if Crafty plays "humanlike" chess just with reduced intensity. I think it is reasonably so, but of course I don't expect it is like Byrne's weak "personalities". I think Rebel's play with a chosen ELO is very nice. Also I like Bringer's reduced ELO feature. Obviously Chessmaster large set of personalities have to be mentioned, it is good fun for not-so-strong players.
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